This compound is primarily used in modern pickling processes for steel. One method for producing PVC plastic works by reacting acetylene with this compound. This compound is secreted by parietal cells and G cells and was once known as muriatic acid. Aqua regia consists of a 
This compound is primarily used in modern pickling processes for steel. One method for producing PVC plastic works by reacting acetylene with this compound. This compound is secreted by parietal cells and G cells and was once known as muriatic acid. Aqua regia consists of a mixture of nitric acid and this acid which is the active component in gastric acid secreted in the stomach. For 10 points, name this strong monoprotic acid with formula HCl.
This compound is primarily used in modern pickling processes for steel.
{hydrochloric} acid [accept {HCl} before it is read; prompt on {muriatic acid} before it is read]